ColorType Property

       

Returns or sets an MsoPictureColorType constant indicating the type of color transformation applied to the specified picture or OLE object. Read/write.

MsoPictureColorType can be one of these MsoPictureColorType constants.
msoPictureAutomatic
msoPictureBlackAndWhite
msoPictureGrayscale
msoPictureMixed  Return value only; indicates a combination of the other states in the specified shape range.
msoPictureWatermark

expression.ColorType

expression   Required. An expression that returns one of the objects in the Applies To list.

Example

This example sets the color transformation to grayscale for the first shape in the active publication. The shape must be either a picture or an OLE object.

ActiveDocument.Pages(1).Shapes(1).PictureFormat _
    .ColorType = msoPictureGrayScale